10-28-2009, 09:45 PM
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#1 (permalink)
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Join Date: Oct 2009 Location: SE MN
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|  Travel limiter for hyd. cyl.
Is there such a device that would act as a travel limiter for a dual acting hydraulic cylinder to limit its extented length? The only thing I can come up with would be to put a loop of cable around both ends. Or maybe attach a length of chain some how to both ends? Any ideas? | 
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10-28-2009, 09:59 PM
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#2 (permalink)
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Join Date: Mar 2009 Location: Wisconsin
Posts: 1,259
| Re: Travel limiter for hyd. cyl.
Quote:
Originally Posted by Couple of Achers  Is there such a device that would act as a travel limiter for a dual acting hydraulic cylinder to limit its extented length? The only thing I can come up with would be to put a loop of cable around both ends. Or maybe attach a length of chain some how to both ends? Any ideas? | There is a vavle you can get to shut off flow at your predetermined setting.
Can't think of the name of it right now. 
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10-28-2009, 11:17 PM
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#3 (permalink)
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Join Date: Sep 2003 Location: JACKSONVILLE, FL
Posts: 5,062
| Re: Travel limiter for hyd. cyl.
Quote:
Originally Posted by Couple of Achers Is there such a device that would act as a travel limiter for a dual acting hydraulic cylinder to limit its extented length? The only thing I can come up with would be to put a loop of cable around both ends. Or maybe attach a length of chain some how to both ends? Any ideas? | Stroke controls can be either internal or external. Which do you want. The push out/extend can be limited by a bushing on the rod, inside the cyl, or the pull in stroke can be limited by a sleeve on the outside of the cylinder rod. http://www.wadler.com/products.asp http://www.royalbrassandhose.com/cat..._parts/261.pdf http://www.norwest-mfg.com/catalog/TIL1000.pdf Hydraulic Cylinder Components, Products
search------stroke control
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J.J.
When I works, I works hard. When I sits and thinks, I goes to sleep.
Git er done, if-fen you want to..
Last edited by J_J; 10-28-2009 at 11:42 PM.
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10-29-2009, 01:23 PM
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#4 (permalink)
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Join Date: Aug 2007 Location: Wayne County Pa.
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| Re: Travel limiter for hyd. cyl.
What you need is to determine how much stroke you need to remove. Then, you disassemble the cylinder, and put a stroke limiter between the piston and gland. If you look at the Baum hydraulics website, don't have the url handy, you can search for stroke limiter or stroke control and go from there.
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10-29-2009, 08:51 PM
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#5 (permalink)
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Join Date: Oct 2009 Location: SE MN
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| Re: Travel limiter for hyd. cyl.
Thanks for the replies. I should have given more details in the original post. It is a small bore (1"bore - 1/2" rod) welded cylinder. So I am trying to dream up something external to ad to the cylinder. It has 1500 psi working pressure. That's why I was thinking of a predetermined length of cable formed in a loop and then placed in the tie rod ends then pin the cylinder in place. Once the cylinder stretched out the loop of cable, do you think the cable would hold or would the cylinder just snap the cable? If not a cable, then maybe a chain? I also thought about putting in longer pins and connecting two pieces of chain, one on each side of the cylinder between the pins. But it may just bend the pins or break the ends. Just kind of thinking out loud. | |
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10-29-2009, 09:22 PM
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#6 (permalink)
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Join Date: Sep 2003 Location: JACKSONVILLE, FL
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| Re: Travel limiter for hyd. cyl.
That cylinder only has a push force of 1178 lbs, and pull force of 884 lbs. Chain should be OK. I don't think you will break chain, depending on size.
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J.J.
When I works, I works hard. When I sits and thinks, I goes to sleep.
Git er done, if-fen you want to.. | |
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11-02-2009, 05:17 PM
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#7 (permalink)
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Join Date: Oct 2009 Location: SE MN
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| Re: Travel limiter for hyd. cyl.
Quote:
Originally Posted by J_J That cylinder only has a push force of 1178 lbs, and pull force of 884 lbs. Chain should be OK. I don't think you will break chain, depending on size. | J_J, I hope you're calculations are right. There was no room to put a chain on the cylinder it self, so I mounted the chain as close to the cylinder as I could without interfering with the travel of the cylinder. Drilling holes in a brand new snowblower can be a little nerve racking, but I figured if I mess it up, somebody can fix it. In theory, this will limit the travel of this 6" stroke cylinder to 5". Since 5" is the over all travel of the blower chute and I couldn't find a 5" stroke cylinder and a 4" stoke retracted length was too short. I really never plan to test this theory. It is more of an insurance policy if I would happen to fall asleep with my finger on the valve lever some day. Thanks everyone for your input. Once I get the plumbing done, I'll let you know how it works. | |
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11-02-2009, 06:08 PM
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#8 (permalink)
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Join Date: Sep 2003 Location: JACKSONVILLE, FL
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| Re: Travel limiter for hyd. cyl.
Do you have any idea or the tensile strength of the chain you are using, and the connector link?
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J.J.
When I works, I works hard. When I sits and thinks, I goes to sleep.
Git er done, if-fen you want to.. | |
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11-02-2009, 06:49 PM
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#9 (permalink)
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Join Date: Oct 2009 Location: SE MN
Posts: 198
| Re: Travel limiter for hyd. cyl.
Quote:
Originally Posted by J_J Do you have any idea or the tensile strength of the chain you are using, and the connector link? | No, I don't. My intent is to not use the connector link at all. I just used what I had around the shop today basically to get some rough measurements and to get the clevis's mounted. I have to get to town to pick up the plumbing for this, as well as some 1/2" pins, so while I am there I will pick up some new chain for it as well. Based on your calcs, what tensile strength chain should I be looking for? | |
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11-02-2009, 07:03 PM
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#10 (permalink)
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Join Date: Sep 2003 Location: JACKSONVILLE, FL
Posts: 5,062
| Re: Travel limiter for hyd. cyl.
This is double the strngth that the cylinder will push. 1/4 chain. Gr 43 High Test Binder Chains
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J.J.
When I works, I works hard. When I sits and thinks, I goes to sleep.
Git er done, if-fen you want to.. | |
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